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What is the Average Furnace Repair Cost? What You Can Expect to Pay

Your furnace has been acting funny as of late. You’re not sure what the problem is, but you do know one thing: it’s in desperate need of repair. Now you’re wondering how much this is going to cost! When…Thursday, November 14th 2019, 6:25 AM PST

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Your furnace has been acting funny as of late. You’re not sure what the problem is, but you do know one thing: it’s in desperate need of repair.

Now you’re wondering how much this is going to cost! When something breaks that you know you can’t fix yourself, this may be the first thought to cross your mind.

You know home repairs are not generally going to be cheap, but how much does the average furnace repair cost?

If you need more information about the cost of furnace repair, keep reading and learn what you need to know to make an informed decision.

What’s the Average Furnace Repair Cost?

At the present time, the average cost of furnace repair sits at $287. However, in most cases, you can expect to pay between $132 and $456.

The exact cost of your repair is dependent on a number of factors, including the area in which you live, the shop at which you receive repair, and the specific type of repair received.

Below, we’re going to discuss some of the most common repairs needed, providing you with the average costs associated with them.


The thermostat communicates with the furnace, informing it as to the temperature it should produce. If a thermostat goes bad, its corresponding furnace will produce no or inconsistent air.

Generally speaking, it costs between $100 and $300 to have a thermostat repaired. A replacement, on the other hand, can cost as much as $600.

Flame Sensor

The flame sensor ensures that the furnace produces heat consistently. If the sensor goes bad, the furnace will cease to operate.

The cost to have a flame sensor repaired? It generally falls between $75 and $250.


Thermocouples serve the same purpose as flame sensors, ensuring that their corresponding furnaces produce heat regularly. Whereas flame sensors are used in most modern models, thermocouples are used in older models.

Should your thermocouples suffer damage, you’ll need to pay somewhere between $150 and $250 to have them replaced.


If you use an electric furnace, it makes use of a transformer. The transformer supplies power to the furnace, allowing it to operate. Should it go bad, it will need to be replaced.

To replace a transformer, you’ll have to pay somewhere between $100 and $175.

Heat Exchanger

The heat exchanger is responsible for heating air before it’s pushed through ducts. If impaired in any way, it can cease all functionality.

To repair a damaged heat exchanger, you’ll have to pay somewhere between $100 and $200. To replace a damaged heat exchanger, you’ll have to pay somewhere between $500 and $1,500.

Blower Motor and Blower Motor Capacitor

The blower motor and blower motor capacitor work together to push heated air through ducts. If these implements are not cleaned regularly, they can incur damage.

Repair for a blower motor costs between $100 and $200. A full replacement costs around $1,500. Capacitors, on the other hand, can be replaced for between $150 and $450.

Relay Switch

The relay switch interacts with the thermostat in order to activate the furnace. Unfortunately, relay switches can become damaged from time to time. In most cases, they can be repaired for between $150 and $300.


In a furnace, the ignitor triggers the chain reaction which results in heat. Over time, ignitors can wear out, prompting replacement. Fortunately, most ignitors can be replaced for between $150 and $300.

Control Board

The control board of a furnace is responsible for turning off the gas that flows to different parts of the furnace. Though control boards generally last for the duration of their corresponding furnaces, they can die prematurely.

The cost to replace a control board is dependent on the furnace in which it exists. In some models, it can be replaced for between $200 and $400. In others, it can cost up to $600.

Oil Combustion Chamber

Oil combustion chambers are where all of the magic happens. When a flame ignites in a furnace, it does so in the oil combustion chamber. As such, these chambers can get really dirty really fast.

If you don’t clean your oil combustion chamber regularly, you might need to have it replaced. Replacement services will cost you somewhere between $200 and $600.

Draft Inducer Motor

Draft inducer motors are used to push out toxic gases, particularly carbon monoxide. They work in tandem with the flue pipe in order to do this.

Should your draft inducer incur damage, you can have it repaired. This can cost anywhere from $200 to $800.

However, in some cases, a replacement will be needed instead. This can cost up to $1,500.

Flue Pipe

The flue pipe collects toxic gases and filters them out of the furnace. Unfortunately, over time, it can experience oxidation. This can lead to deterioration.

If you’re dealing with a deteriorated flue pipe, you’ll likely need to have it replaced. This can cost anywhere from $400 to $800.

Gas Valve

The furnace gas valve is used to transfer gas into the furnace. Though not typical, it can deteriorate over time. This could prompt the need for a replacement.

Gas valves can be replaced for between $200 and $600. The exact price will depend on the model that’s needed.

How to Tell When Furnace Repair is Needed

There are several signs to look out for to determine whether furnace repair is needed. The most obvious of these signs is a furnace that won’t produce hot air (which is the point of the furnace in the first place!).

Other signs include short-cycling, increases in energy usage, strange noises, and strange smells. If you use an old furnace, you might also want to look for the pilot light. If it’s blue, you’ve got a major problem (carbon monoxide) and will require repair immediately.

Looking for specifics? You can find them in’s furnace repair guide. And remember, the sooner you notice potential problems, the less damage those problems will cause in the long-run.

Looking to Learn More About the Appliances in Your Home?

Now that you know a little something about the average furnace repair cost, you might be looking to learn more about your home. If so, you’re in the right place.

Our website covers a wide variety of home improvement topics, offering advice on repair, maintenance, installation, and more. Start improving your home by reading our other articles now!

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